An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 1.8 m (6 ft) is connected to an electric heater which draws 17.0 a on a 120-v line. how much power is dissipated in the cord? express your answer using two significant figures.

Explain the doppler effect in terms of frequency, wavelength, and speed.

The us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton